Ava made 100 paper cranes, and Brittany made 3/4 of paper cranes Ava made. Ava gave 9/20 of her paper cranes to Brittany. Then, Brittany gave 1/4 of her paper cranes to Ava. How many more cranes did Brittany have than Ava in the end?

Answer 1

3/4 of 100 is 75. 9/20 of 100 is 45 so she gave 45 cranes to Brittany which means Ava has 55 cranes now. 75+45=120. 1/4 of 120 is 30 so she gave 30 to Ava so Brittany now has 90. 90-55=35, so the answer is 35 cranes.